Automobile doorlatch



Jama 15, 1935. JlCD'RESSENS -FAL 1,987,927

AUTOMOB ILE DOORLATCH Filed Nov. 21,` 1932 v fj n f- Y I, flo W lll H r HH Patented Jan. 15, 1935 UNI TED v"S TA 1'l"-A E S JP AT1-ENT oFF-'Fillos '.Thei:latch, or vlock aas 'it ,is..known' commerd This invention relates to improvements in .automobile door latches :and more particularly to; those .of the remote control type, in which .the inside .operatingqhandle .isvmounted on the .door at some distance from the latch .mechanism andxisxconnected thereto byia linklconcealed in said door.

One object of the invention is to .provide an improved, simple, rugged construction whereby the latch` bolt ,may be held tothe case .plate and guided on it in its movement withoutithe usual .cover plate, thusin'suring a thin structure Well 'adaptedvto fit in thef-narrowspacev available in lanautomobile door.

fAnotherobject is` toffprovide an `improvedrdoor -ilatch finf'whichnthesbolt, except its zhead, is Yformed of @heet-metal, V,spaced from the Vcase plate so that it imay y.partially -overlie a ,llink iplate `mounted*tofreciprocate yon said case 'plate and "be engaged by .a projection on the latter,

- to' retract-said :bolt Iwhentthednside handle is operated.

yAnother 'object .is tojprovide a `latch of .this type -in which `the :rolle-back `forf-retracting the bolt .by `ahandleon .the outside of the. carmay be Vlockedwhenever desired, and rautomatically unlocked by the operation of .theqinsidehandle ye/1; further object is. togprovide ,a'housing for the vroll-,back secured to said faceplate and having -an openingfin line-,with anopening in ,the face platei-whereby said roll-back maybe -journaledin both openings and thusafforded a rigidsupport.

An additional object is toyprovide `a-locking device, independent of `the bolt retracting mechanismactuatedby the insidehandle, which may be set by hand to obstruct the roll-back and prevent opening of the door by the outside handle, but which is automatically restored to initial position by a cam on the latch when the latter is retracted by the inside handle.

Other objects and advantages will be apparent from the following description of the drawing in which:

Fig. 1 is an elevation of one embodiment of the invention;

Fig. 2 is a top plan view thereof;

Fig. 3 is a section on the line 3-3 of Fig. 1;

Fig. 4 is an end view of the rollback;

Fig. 5 is a perspective view of the housing therefor;

Fig. 6 is an elevation of the bolt with the head omitted;

Fig. 7 is an end view thereof;

Fig. 8 is an elevation of a link plate,

its back and`r forth movement.

cially, :comprises ithenusual case plate l'fhaving ,its outer end bent ,nearlyat' right angles .to

form an end flange 11 with an openingtherein reciprocate. VThe `body of the :latch'bolt 13,

.shown in;Fig. `6, .is formed fpreferablyfromasheet nmetal having Vopenings .14 atf. its forwardaend permitting it toberiveted:orfotherwise secured Said ahead' :is `cut .awayz .at the n rear,v formingfa-shoulder and providing anextension 15 of reduced thickness to which the to the'. head 12.

body is riveted vas stated. Said 'body `isvthus spaced from the-:caseplate to kprovideg-a clearance between the two. At or nearthe reariof;

the body of said bolt, aipair vof lateral fprojec- -tions-'16 are bent :downwardly lwhich-'would also serve to `space said bodyifrom; saidl case, plate `:were'it fnot for'the fact .that the rear endis otherwise supported,.asxhereinafterf` explained.

ArIlhescase plate'.A` has a; pair of w struck -up :lugs 1'7 whichr are --embraced v :by the downwardly turned lugs 16y and, serve tonguide theffbolt-'in -At the rear of said bolta-slot 18 is provided to receivefafpin or stud19 v.which maybe riveteduorzotherwise secured to the'case plate as shown in Fig.-3a,and which :has-ahead. 20 `serving` to.,hold the bolt to the case plate withoutithe usual cover .,plateand .at .theysame time fpermittingit toV rec iprocate.-

The -head of the-stud or rivet120 doesnot 'engage the-body of the boltxdirectlywbut :has a-.spring washer 2 1 interposed :between the i two-with l. additional-.spring'washers below theplate 113, as

'shown in Fig. 3. These washers yieldinglysupnA lportthe plate-13.". at ithex'proper; :height above the case plate. In other words there is a slight clearance between the downwardly bent lugs 16 and said case plate as shown in said Fig. 3.

The usual spiral spring 22 is mounted on said case plate (see Fig. 1) with its free end bearing against the inner end of the extension 15 on the bolt head 12, to maintain the bolt normally in outermost position. This extreme outer position is determined by the engagement of the rivet 19 with the end of the slot 18.

Additional lugs 23 are formed on the body of the bolt 13, preferably at the extreme rear, as shown in Fig. 6, and these lugs are depressed a little below the surface of said body 13, as shown in Fig. 7.

The latch bolt is retracted by means of a link plate 24 (see Fig. 8) which has a slot 25 therein to accommodate the rivet 19. This link plate is also guided in its back and forth movement by struck up lugs 26 which are conned between the struck up lugs 17 on the case plate, (see Fig. 3). Said link plate has a forward extension 27 which also slides between guides formed by struck up lugs 28 in the case plate, (see Fig. 1). The latch bolt partially overlies said link plate and embraces the same, with the lugs 23 in the path of movement of the upwardly turned lugs 26, as shown in Fig. 1, whereby as the link plate is pulled rearwardly, the lugs 26 engage the lugs 23 and retract the latch bolt. This rearward movement is accomplished by a link 29 which fits over the usual headed rivet 30, the rear end of said link being connected with the inside operating handle, not shown. The link plate, it will be noted, may be moved independently of the latch bolt and vice versa. For example, when the door is slammed, the bolt moves rearwardly without moving the link plate rearwardly. Also, the link plate, as shown in Fig. 1, is in its rearmost position with reference to the latch bolt and may be moved forwardly by manipulating the inside operating handle.

'Ihe roll-back 31 is shown in Fig. 4 as having reduced extensions 32 on opposite sides, received in an opening in the case plate and in an opening 33 in a sheet metal housing 34, shown in Fig. 5, hereinafter described. Thus the roll back is journaled at opposite ends and rigidly supported. It has the usual non-circular opening 35 therethrough to admit the shaft on which the outside actuating handle is mounted. The roll back cam 36 has an enlargement thereon as shown in Fig. 4.

'I'he body 13 of the latch bolt has a lateral arm 37 projecting therefrom the end of which is turned over at 38 to provide a larger bearing surface for engagement by the roll back cam 36 where the outside handle is turned to withdraw the latch bolt. Said lateral extension also has a cam surface 39 thereon to reset the locking device as hereinafter explained.

The locking device may be of any suitable or accepted form and in the present instance is preferablyin the form of a plate 40, of special outline, as shown in Fig. 1, arranged to slide up and down between guides 41 in the form of a small cover riveted to the face plate and open at the rear to accommodate a spring 42 secured to said cover and having its free end arranged to snap into either of two grooves 43 on the rear surface of said plate, thereby tending to maintain the latter in upper or lower position. The locking plate, or dog, is depressed by a suitable handle, not shown, which may be connected thereto at 44, whereby the operator may depress said plate so that the locking projection 45 thereon is lowered suiiiciently to obstruct the rearward throw of the roll back cam 36 and thus prevent the door from being opened by the outside handle. An inclined or cam surface 46 below the locking projection 45 is arranged in the path of movement of the cam surface 39 on the latch bolt so that when the latter' is drawn rearwardly by the inside handle, the locking dog is restored to initial position.

The small housing 34, previously referred to, is formed by bending down a plurality of extensions 49 with lugs 50 thereon which pass through openings in the case plate and are upset to rivet the enclosure in place. They structure thus formed is substantially closed at one end by the case plate flange l1 and at the other end by one of the bent down wall portions 50. An opening is left at the top and bottom, however, to accommcdate the lower` end of the locking plate and the arm on 'the latch bolt. This enclosure or housing is of triangular form although it may be otherwise shaped, and, as previously stated, it aids in forming a rigid bearing for the roll back in addition to covering the latter.

We claim:

In a remote control door latch, a case plate having a front fiange with an opening therein, two struck-up lugs at the rear, a sheet metal bolt having a solid head at the front slidable in said opening, said head having a rear shoulder to which said sheet metal bolt is secured in spaced relation from said case plate, said sheet metal bolt having downwardly turned edges at the rear to engage said struck-up lugs and guide said bolt, a link plate beneath said sheet metal bolt and between said struck-up lugs, a pin mounted in said case plate passing through slots in said link plate and said bolt and having a i head to hold the same to said plate while permitting reciprocation thereof, a triangular sheet metal enclosure secured at its front and rear to said case plate but open at the top and bottom thereof, a roll-back within said enclosure, an arm on said bolt extending through said bottom opening to said roll-back and a locking member mounted on said case plate above said roll-back and having a part movable through said top opening to a position behind said roll-back to obstruct the same and having a cam surface to be engaged by said arm when said bolt is retracted to automatically raise said part and free said roll-back.

JOSEPH C. DRIESSENS. WILLIAM A. CARMICHAEL. 

